Although the origin of the chainsaw is debatable it is determined that the first chainsaw was made around 1830 by Bernard Heine a German orthopedist. This chainsaw was used for cutting through bone. Although this may have been for a more gruesome purpose the idea was born Nowadays chainsaws have almost completely eradicated the use of simple hand-held saws in the forestry sector.
A chainsaw is basically a mechanized saw that is normally
portable and handheld. It is widely used for felling trees cutting branches,
harvesting firewood and cutting through wood for various other reasons. It
normally has an engine that runs on petrol electricity or even a more advanced
internal combustion motor.
As mentioned previously there are chainsaws which can be used to cut through
stone. Chainsaws that are used to cut through stone or concrete are almost
identical to a regular chainsaw. The only difference is that the cutting edge
will be made with diamond and the chain can only be lubricated with water to
avoid friction. A normal chainsaw for felling wood will be lubricated with oil
or the fuel that runs the motor. Chainsaws that cut through stone or concrete
are normally used in construction, and are very precise in helping to avoid
damage to the surrounding structure.
There are stringent safety measures to adhere to when operating a chainsaw. The
most dangerous thing about a chainsaw is the kickback or push-back. This is
when the tooth at the tip of the guide bar catches on the wood instead of
cutting through it. This can throw the bar with its moving chain straight up
towards the operator or anyone standing nearby. Push-back frequently occurs
when the top of the bar is used for cutting. To avoid push-back you should
always be alert to forces or situation that may cause the material to pinch the
top of the chain. No more than one log must be sawed at a time, and the saw
must never be twisted when you are withdrawing the bar from a plunge cut.
Another chainsaw danger is pull-in. This is when the chain on the bottom of the
bar is suddenly stopped. The chain on the bottom of the bar stops when it is
pinched caught or encounters a foreign object in the wood. The reaction of the
chain pulls the saw forward and may cause the operator to lose control. Pull-in
frequently occurs when the bumper spike of the saw is not held securely against
the tree or limb and when the chain is not rotating at full speed before it
contacts the wood. The trick to avoiding pull-in is to always start a cut with
the chain rotating at full speed and the bumper spike in contact with the wood.
There are many more risks associated with chainsaw operation. The danger of
timber falling and trapping the operator is something to take into
consideration. The chain must be maintained properly and you should never use
your chainsaw to cut into inappropriate materials. Even just the vibrations of
the chainsaw can cause White Finger Disease. Protective clothing should be worn
at all times. Some recommended protective gear is a hard hat safety glasses
thick gloves and ear muffs. In most countries you will be required to undergo
training in maintenance and operation before you will be allowed to use a
chainsaw.
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